Series LOH

The LOH Series liquid ring vacuum pumps are two-stage displacement pumps with a robust and simple design. Built for reliability, they are suitable for a wide range of industrial applications.

Key features:

• Handles nearly all gases and vapours
• Non-polluting, thanks to nearly isothermal compression
• Oil-free operation (no lubrication in the working chamber)
• Can handle small quantities of entrained liquid
• Easy maintenance, highly reliable
• Low noise and minimal vibration
• Available in various material options
• Built-in central drain
• No metallic contact between rotating parts

LOH Series Applications:

These pumps are designed for handling and exhausting dry and humid gases. They are also capable of tolerating entrained liquid during normal operation. Suitable for processes requiring vacuum pressure between 33 and 900 mbar.

Industries:

• Chemical and pharmaceutical – distillation, degassing

• Electrical – impregnation, drying

• Plastics – degassing

• Other vacuum-based processes

Technical data:

• Suction volume flow: up to 60 m³/h

• Suction pressure: 33 to 1013 mbar

• Shaft seal: Gland packing or mechanical seal

• Materials: Grey cast iron, bronze, stainless steel

• LOH vacuum pump

Looking for a Reliable Vacuum Pump? Get in touch for sizing assistance, quotation, or technical details on the LOH Series.

Series LPHX, LPH

Single-Stage Liquid Ring Vacuum Pumps

The LPHX and LPH Series are single-stage displacement vacuum pumps designed with a simple yet robust construction. Built for industrial reliability, they offer:

Key features:

• Nearly isothermal compression
• Oil-free operation (no internal lubrication)
• Handles almost all gases and vapours
• Tolerates liquid carryover during normal duty
• Low maintenance, safe, and reliable operation
• Quiet and nearly vibration-free
• Available in a wide range of materials
• Standard O-ring sealing
• Standard cavitation protection
• Built-in drain hole and solids drain
• No metallic contact between rotating parts (minimises wear)

LPHX, LPH Applications

Ideal for handling and exhausting dry or humid gases. These pumps perform reliably even with entrained liquids and are suitable for vacuum applications requiring pressures from 120 to 900 mbar.

Typical industries:

• Chemical and pharmaceutical – distillation, degassing

• Electrical – impregnation, drying

• Plastics – degassing

• And more vacuum-demanding processes

Technical Data

• Suction volume flow: up to 10,700 m³/h

• Suction pressure: 120 to 1013 mbar

• Shaft seal: Gland packing, Mechanical seal

• Materials: Grey cast iron, Stainless steel

•  SIHI^® LPH-X Liquid Ring Vacuum Pumps

Need a high-capacity vacuum solution? Contact us today for a quotation, technical guidance or detailed documentation.

Series SL

Single-Stage Liquid Ring Vacuum Pumps

The SL Series liquid ring vacuum pumps are single-stage displacement pumps with a compact and robust construction, ideal for mobile and industrial applications.

Key features:

• Handles all gases and vapours
• Insensitive to entrained liquids
• Low noise and minimal vibration
• Direct drive or belt drive options
• Compact, weight-saving design
• Oil-free operation (no lubricant in working chamber)
• Symmetrical design allows clockwise or anticlockwise rotation
• Durable steel construction with dirt drainage to reduce wear
• Wide operating speed range (800 to 1,600 rpm)
• Leakage-proof shaft seal
• Seal options: radial shaft seal ring, gland packing, or mechanical seal with bellows

SL Series Applications

Specially developed for waste disposal vehicles, the SL Series meets the key requirements of vacuum systems used in mobile waste management:

• Fast evacuation time
• Lightweight design
• High reliability
• Environmentally friendly operation
• Quiet performance, especially important in urban areas

Technical Data

• Suction volume flow: up to 3,080 m³/h
• Suction pressure range: 150 mbar to 1.5 bar
• Shaft seal options: Radial shaft seal ring, gland packing, mechanical seal
• Material: Grey cast iron

Need a rugged and quiet vacuum solution for mobile applications? Contact us for sizing assistance, datasheets or a custom quotation.

Series LOH

Liquid ring vacuum pumps of the series LOH are two-stage displacement pumps of uncomplicated and robust construction with the following particular features like handling of nearly all gases and vapours, non-polluting due to nearly isothermal compression, oil-free (no lubrication in the working chamber), small quantities of entrained liquid can be handled, easy maintenance and reliable, low noise and nearly free from vibration, wide choice of material (therefore applicable nearly everywhere), incorporated central drain and no metallic contact of the rotating parts.

Applications:

Handling and exhausting of dry and humid gases. Entrained liquid can be handled during normal duty. The pumps are applied in all fields where a pressure of 33 to 900 mbar must be created by robust vacuum pumps. Fields of application are for example the chemical and pharmaceutical industry (distilling and degassing), the electric industry (impregnation and drying), the plastics industry (degassing) and many more.

Technical Data:

Suction volume flow: up to 60 m³/h

Suction pressure: 33 up to 1013 mbar
Shaft seal: gland packing, mechanical seal
Materials: grey cast iron, bronze, stainless steel

• Catalogue – LOH 05501, 2.7 – 6.1 m³/h, 80 – 1013 mbar
• Catalogue – LOH 25003/25007/25309, 11 – 60 m³/h, 33 – 1013 mbar

Series LPHX, LPH

Liquid ring vacuum pumps of the series LPHX/LPH are two-stage displacement pumps and have a simple but robust construction with the following features and benefits like near isothermal compression, oil-free (no internal lubrication), capable of handling almost all gases and vapours, able to handle quantities of liquid “carry over”, low maintenance and safe operation, low noise and almost vibration free, available in a wide range of materials, broad range of applications, O-ring sealing as standard, cavitation protection as standard, drain hole as standard, built-in solids drain and rotating metallic parts are non contacting to minimise wear.

Applications:

Handling and exhausting of dry and humid gases. Entrained liquid can be handled during normal duty. The pumps are applied in all fields where a pressure of 33 to 900 mbar must be created by robust vacuum pumps. Fields of application are for example the chemical and pharmaceutical industry (distilling and degassing), the electric industry (impregnation and drying), the plastics industry (degassing) and many more.

Technical Data:

Suction volume flow: up to 10,350 m³/h

Suction pressure: 33 up to 1013 mbar
Shaft seal: gland packing, mechanical seal, magnetic drive
Materials: grey cast iron, stainless steel

• Catalogue – LPHX 45008/45311/45316, 55 – 258 m³/h, 33 – 1013 mbar
• Catalogue – LPHX 55312/55316/55320, 120 – 470 m³/h, 33 – 1013 mbar
• Catalogue – LPHX 65320/65327, 300 – 700 m³/h, 33 – 1013 mbar
• Catalogue – LPH 75320/75330/75340, 500 – 1,700 m³/h, 33 – 1013 mbar
• Catalogue – LPH 75320/75330/75340 mag drive, 485 – 1,615 m³/h, 33 – 1013 mbar
• Catalogue – LPH 85340/85353, 1,100 – 3,100 m³/h, 33 – 1013 mbar
• Catalogue – LPH 95354/95367, 2,000 – 4,200 m³/h, 33 – 1013 mbar
• Catalogue – LPH 10534, 3,300 – 7,400 m³/h, 33 – 1013 mbar
• Catalogue – LPH 11535, 4,900 – 10,350 m³/h, 33 – 1013 mbar

Series LEH

Liquid ring vacuum pumps of the series LEH are single-stage displacement pumpsand have a simple but robust construction with the following features and benefits like near isothermal compression, oil-free (no internal lubrication), capable of handling almost all gases and vapours, able to handle quantities of liquid “carry over”, low maintenance and safe operation, low noise and almost vibration free, available in a wide range of materials, broad range of applications, O-ring sealing as standard, cavitation protection as standard, drain hole as standard, built-in solids drain and rotating metallic parts are non contacting to minimise wear.

Applications:

Handling and exhausting of dry and humid gases. Entrained liquid can be handled during normal duty. The pumps are applied in all fields where a pressure of 33 to 900 mbar must be created by robust vacuum pumps. Fields of application are for example the chemical and pharmaceutical industry (distilling and degassing), the electric industry (impregnation and drying), the plastics industry (degassing) and many more.

Technical Data:

Suction volume flow: up to 5,150 m³/h

Suction pressure: 33 up to 1013 mbar
Shaft seal: gland packing, mechanical seal, magnetic drive
Materials: grey cast iron, stainless steel

• Catalogue – LEH 1200/1500/1800, 440 – 2,050 m³/h, 33 – 1013 mbar
• Catalogue – LEH 1200/1500/1800 magnetic , 400 – 1,560 m³/h, 33 – 1013 mbar
• Catalogue – LEH 2200/3000, 730 – 3,550 m³/h, 33 – 1013 mbar
• Catalogue – LEH 3600/4400, 1,100 – 5,150 m³/h, 33 – 1013 mbar